package com.springsecurity.demo.auth;

import com.springsecurity.demo.dao.ApplicationUserDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Service;

/**
 * DESC:
 *
 * @author : yj
 * @since : 2020-08-22
 */
@Service
public class ApplicationUserService implements UserDetailsService {

    private final ApplicationUserDao applicationUserDao;
    @Autowired
    public ApplicationUserService(@Qualifier("fake") ApplicationUserDao applicationUserDao) {
        this.applicationUserDao = applicationUserDao;
    }

    /**
     * Locates the user based on the username. In the actual implementation, the search
     * may possibly be case sensitive, or case insensitive depending on how the
     * implementation instance is configured. In this case, the <code>UserDetails</code>
     * object that comes back may have a username that is of a different case than what
     * was actually requested..
     *
     * @param username the username identifying the user whose data is required.
     * @return a fully populated user record (never <code>null</code>)
     * @throws UsernameNotFoundException if the user could not be found or the user has no
     *                                   GrantedAuthority
     */
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        return applicationUserDao
                .selectApplicationUserByUsername(username)
                .orElseThrow(() ->
                        new UsernameNotFoundException(String.format("username %s not found", username)));
    }
}
